Portland weather in May 2024

Expect 64°F daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Portland in May. Check more long-term weather averages for Portland in May before you book your next holiday to Maine in 2024/2025.

64
64°F max day temperature
8
8 hours of sunshine per day
12
12 days with some rainfall
43
43°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
3.6
3.6 inches of monthly rainfall
7
7 (High) UV index
46
46°F sea temperature

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The May weather guide for Maine (Portland) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)

More about the USA

How hot is it in Portland in May?

Daytime temperatures usually reach 64°F in Portland in May, falling to 43°F at night.

How sunny is it in Portland in May?

There are normally 8 hours of bright sunshine each day in Portland in May - that's 52% of daylight hours.

How warm is the sea around Portland in May?

The average sea temperature around Portland in May is 46°F.

Does it rain in Portland in May?

There are usually 12 days with some rain in Portland in May and the average monthly rainfall is 3.6 inches.

Portland May sunrise & sunset times

Browse the sunrise and sunset times for Portland in May 2024. Select a month to view Portland sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Wednesday, 1st May 2024	05:33	19:44
Thursday, 16th May 2024	05:14	20:01
Friday, 31st May 2024	05:03	20:15

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Maine - quick facts
Flight time^✝	11 hours
Time difference	UK -5 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Why visit?	Nature
Tourist info	Maine Office of Tourism